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Texas Instruments UCC256304 | Demoboard PMP40482
250-W single-stage LLC converter with multiple outputs reference design
Overview
| Topology | LLC Resonant Converter |
| Input voltage | 85-115 V |
| Switching frequency | 35-1000 kHz |
| Output 1 | 22 V / 0.15 A |
| Output 2 | 25 V / 0.4 A |
| Output 3 | 60 V / 2.5 A |
| Output 4 | 12 V / 7.5 A |
| IC revision | 002 |
Description
This is a single-stage reference design converting AC input voltage 85-115-V AC to three isolated outputs - 12 V/7.5 A, 60 V/2.5 A, 25 V/0.4 A with one non-isolated output 21 V/0.15 A using the UCC256304 resonant controller. The design is for industrial applications and the bill of materials (BOM) cost is highly optimized with the single-stage structure and the use of the resonant controller. The high voltage startup, integrated driver and burst operation of UCC256304 allows minimum use of discrete components and eliminates the need for an auxiliary supply.
Features
- Single-stage AC/DC solution with 85-115-V AC input range eliminates the need of front-end PFC
- Generates multiple output voltages applicable to different applications
- Weighted feedback enables tight-cross regulation for 60-V and 12-V DC outputs
- Low profile design with maximum board height of 35 mm
- Provides efficient power conversion with greater than 92% peak efficiency
Typical applications
- Multi-Functional Printers / Projectors / ATX Power Supply
- Multi-Axis Servo
- Digital TV SMPS / Appliances
- LED Lighting Applications
- High Power Battery Charging
- AC-DC Adapter / Merchant DC-to-DC / DIN Rail Power Supply
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Safety Class | dV/dt(V/µs) | DF @ 1 kHz(%) | RISO | Pitch(mm) | Packaging | IR(A) | L(mH) | RDC max.(mΩ) | VR(V (AC)) | VT(V (AC)) | Material | L(mm) | W(mm) | H(mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WCAP-FTX2 Film Capacitors, Across the mains, 470 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTX2 Film Capacitors | Capacitance470 nF | Safety ClassX2 | Rate of Voltage Rise220 V/µs | Dissipation Factor0.1 % | Insulation Resistance21.28 GΩ | Pitch15 mm | PackagingCarton | – | – | – | Rated Voltage275 V (AC) | – | – | Length18 mm | Width8 mm | Height14 mm | MountBoxed THT | ||||
 | WE-CMBNC Common Mode Power Line Choke Nanocrystalline, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CMBNC Common Mode Power Line Choke Nanocrystalline | – | – | – | – | – | – | – | Rated Current11 A | Inductance4 mH | DC Resistance8.8 mΩ | Rated Voltage300 V (AC) | Insulation Test Voltage2100 V (AC) | MaterialNanocrystalline | Length29 mm | Width19 mm | Height28 mm | MountTHT |